VTT9812FH and VTT9814FH
IR-BlocTM Ambient Light Sensor
IR-Blocking Silicon Phototransistor
The IR-BlocTM family is the only ambient light sensor family on the market that comes in a low cost package with the IR-blocking feature incorporated in a plastic epoxy package. The spectral response is similar to the human eye and a photocell, making it ideal for applications where the response should only be influenced by the visible light.
As part of the IR-Bloc family of ambient light sensor, the VTT9812FH and the VTT9814FH are silicon phototransistors in a standard flat T-1 ¾ end-looking package. They offer the time-proven VTT silicon phototransistor chip that customers have come to rely upon over the years, with the additional IR blocking feature incorporated in the plastic epoxy package. As such they give an excellent response in the visible spectral range, giving a RoHS-compliant alternative to Cadmium Sulphide photocells.
The VTT9812FH is specified for dusk/dawn switching at low light levels around0.2 to 1fc (2 to 10lux).
The VTT9814FH, with its narrow light current tolerance, is especially suited for ambient light control applications around 50 to 100fc (500 to 1000lux).
Key Features
· Visible light response with IR- blocking feature incorporated in the cast epoxy
· RoHS-compliant alternative to photocells
· Low dark current
Applications
· Street light switching
· Interior and exterior light control (dusk/dawn switch)
· Automotive headlight dimmer
· Contrast control
General Characteristics and Electro-optical specifications at 25°C
Parameter
Min
Typical
Max
Units
Conditions
Storage Temperature
-40
100
°C
Operating Temperature
-40
100
°C
Maximum Continuous Power Dissipation
50
mW
Maximum Current
25
mA
Dark Current
1
50
nA
VCE = 5V, 0fc
Collector Breakdown
30
V
IC = 100µA, 0fc
Emitter Breakdown
2.1
V
IE = 100µA, 0fc
Saturation Voltage
0.25
V
IC = 1mA, 400fc
Rise/Fall Time
1.5
µs
IC = 1mA, RL = 100kΩ
Peak Spectral Response
585
nm
Sensitivity at peak
7
A/W
Angular Response
±50
°
At 50% response
Soldering Temperature
260
°C
5 seconds maximum
VTT9812FH
Short Circuit Current
60
µA
100fc, 2850K, VCE = 5V
VTT9814FH
Short Circuit Current
80
120
µA
100fc, 2850K, VCE = 5V
Mechanical Characteristics
描述 [描述] 采用红外阻隔T1¾扁平封装的硅光电晶体管,在可见光谱范围内具有非常好的响应效果。